PR target/47237

	* cgraph.h (cgraph_local_info): New field can_change_signature.
	* ipa-cp.c (ipcp_update_callgraph): Only compute args_to_skip if callee
	signature can change.
	(ipcp_estimate_growth): Call sequence simplify only if calle signature
	can change.
	(ipcp_insert_stage): Only compute args_to_skip if signature can change.
	(cgraph_function_versioning): We can not change signature of functions
	that don't allow that.
	* lto-cgraph.c (lto_output_node): Stream local.can_change_signature.
	(lto_input_node): Likewise.
	* ipa-inline.c (compute_inline_parameters): Compute local.can_change_signature.
	* ipa-split.c (visit_bb): Never split away APPLY_ARGS.
	* tree-sra.c (ipa_sra_preliminary_function_checks): Give up on functions
	that can not change signature.
	* i386.c (ix86_function_regparm, ix86_function_sseregparm,
	init_cumulative_args): Do not use local calling conventions for functions
	that can not change signature.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@169290 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 4 insertions, 0 deletions

diff --git a/gcc/cgraph.h b/gcc/cgraph.h
index 33b31679535..2df3fa54d9f 100644
--- a/gcc/cgraph.h
+++ b/gcc/cgraph.h
@@ -114,6 +114,10 @@ struct GTY(()) cgraph_local_info {
      Currently computed and used only by ipa-cp.  */
   unsigned versionable : 1;
 
+  /* False when function calling convention and signature can not be changed.
+     This is the case when __builtin_apply_args is used.  */
+  unsigned can_change_signature : 1;
+
   /* True when function should be inlined independently on its size.  */
   unsigned disregard_inline_limits : 1;